How to create a UIBarButtonItem in code and make it call a method

Some things are really easy to do via a Storyboard – but when you want to create the same thing in code I frequently forget how to do it.

Turns out it’s equally simple: this example assumes you have a View Controller which is embedded in a Navigation Controller (so it already has a UINavigationBar at the top). Here’s how you add a button to it, set the title and target, and tell it what to do when it’s pressed: